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Thermo flask - wall - air pressure

  1. Apr 16, 2015 #1
    In a thermo flask the air between the outer and under wall is sucked out and a vacuum is created. So the air pressure should push the outer wall towards the inner wall and vice versa. But it doesn't happen. Why?
  2. jcsd
  3. Apr 16, 2015 #2


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    Staff: Mentor

    The walls are strong enough to withstand the pressure and therefor don't bend.
    Last edited: Apr 16, 2015
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